This is your own decision. Be prepared for the fact that the parents may not speak any English. It is ok to say 'no' and ask that they stay in a motel nearby. You can then make arrangements to meet them or invite them to your home. If you agree to them staying and you plan to charge them make it clear to the student how much this will be and what it will cover. Talk immediately to your Study Vision Supervisor about what a fair rent would be. Make the family welcome and ask your student to translate for you.